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Dason ‎(Devorador de queso)
05-10-2017
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# Forum: Probability

Probability course and homework discussion. Probability distributions. Probability theory, stochastic processes

1. ### Sticky: We only provide homework help to those who show effort

Welcome to Talk Stats Forum. In order to keep homework help effective and efficient, we request all members to abide by these guidelines: 1)...

• Replies: 0
• Views: 30,343
09-30-2005, 09:44 AM
1. ### Moved: Data Entry

• Replies: -
• Views: -
BGM
02-15-2013, 01:22 PM
2. ### Moved: Help, and I have no statistical background.

I am taking a course in safety and now have one class left, but ran into a big problem. This class has statistics and I don't have a clue. The text...

• Replies: -
• Views: -
03-01-2006, 01:08 PM
3. ### Tires Probability Question

Question: You recently bought a new set of four tires from a manufacturer who just announced a recall because 2% of that particular brand of tires...

• Replies: 1
• Views: 90
10-19-2017, 09:36 PM
4. ### Ranking products according to their price and probability of sale

Hello! I have little knowledge of statistics/probability theory, so please bear with me. I was wondering about the following: I have a bunch...

• Replies: 0
• Views: 111
09-27-2017, 08:57 AM
5. ### multiplication rule with two random events?

Exercise from mathint.com: "The probability that a student passes Mathematics is 2/3 and the probability that he passes English is 4/9 . If the...

• Replies: 1
• Views: 114
10-06-2017, 03:41 PM
6. ### Measuring strentgh of competing teams

The average number of goals scored per match by Team A when playing on home ground is 2.2 with a standard deviation of 1.3 while the average number...

• Replies: 0
• Views: 130
10-10-2017, 10:53 AM
7. ### 10x 1/100

Hi all, Apologizes for the easy question: Imagine a dangerous mountain where the chance of dying is 1%. If a group of 10 hikes the moutain,...

• Replies: 1
• Views: 146
10-01-2017, 02:07 AM
8. ### probobility of a tax inspecton

From our statistics the probability of getting an inspection in any single week is a pprox 1,000 : 1 I was trying to work out the probability...

• Replies: 1
• Views: 151
09-27-2017, 06:52 PM
9. ### determining the most probable permutation of a set

Is there any way to determine the most probable permutation of any given set? For example, given the set of letters SKTANH, is there a way to compute...

• Replies: 2
• Views: 165
09-30-2017, 02:37 PM
10. ### Sales Probability

First post on this forum so I hope to explain my question appropriately. Our company issues catalogs to 3,000 customers. The products in this...

• Replies: 0
• Views: 168
09-29-2017, 09:01 AM
11. ### Probability summation help

I have the following problem: Two cups, A and B, each contain 1 ml of the same infectious serum. If there is a 30% probability that I will get the...

• Replies: 2
• Views: 168
10-07-2017, 04:41 PM
12. ### Conditional probability problem

Given P(A1) = .12, P(A2) = .07, P(A3) = .05, P(A1 U A2) = .13, P(A1 U A3) = .14, P(A2 U A3) = .10, and P(A1 A2 A3) = .01 What is the probability...

• Replies: 1
• Views: 182
10-08-2017, 05:21 AM
13. ### Understanding independent events.

There is a problem I do not understand: Government data show that 8% of adults are full-time college students and that 30% of adults are age 55 or...

• Replies: 1
• Views: 186
10-20-2017, 09:02 AM
14. ### Combining two sources of uncertainty

I will use an imperfect dice for simplicity. Let's assume there are two factors that influence the probability of the results obtained from throwing...

• Replies: 2
• Views: 194
10-08-2017, 03:51 PM
15. ### What is the probability a particular sequence of 6 letters appearing in 13?

What is the statistical probability a particular set of 6 letters appearing in a 13 alpha-numerical sequence in the case of: ...

• Replies: 1
• Views: 202
09-23-2017, 08:20 PM
16. ### Probability HW help

I need help with these problems. I worked them out, got answers, and checked the back of the book to see if I got them correct. A pair of...

• Replies: 1
• Views: 220
10-03-2017, 12:14 AM
17. ### Determine probabilty of a sampled value being <= 40

Hi all! Brand new poster here, trying to think back to those stats classes that I hated at the time, but now seem fascinating. Ahhhh to be 18 again...

• Replies: 2
• Views: 237
09-28-2017, 12:14 PM
18. ### Help with what a question is asking

I know how to calculate probabilities, but I want to make sure that I am understanding the question. "What is the probability that the Dow Jones...

• Replies: 4
• Views: 242
09-26-2017, 12:00 PM
19. ### I tried to calculate a probability problem..pls review my try?

I will be straight and simple on explanation: Abstract: I was playing bingo in a mobile game with my friend, and I wondered, "what is the...

• Replies: 4
• Views: 252
10-14-2017, 02:18 AM
20. ### Simple Set THeory/Probability Problem

Hello all, I'm very new to statistics as well as this forum, so please bear with me. I've tried solving this for about 30 minutes now and I've...

• Replies: 4
• Views: 253
09-20-2017, 02:16 PM
21. ### a fair gambling game

You want to invent a gambling game in which a person rolls two (unbiased) dice and is paid some money if the sum is 7, but otherwise he loses his...

• Replies: 1
• Views: 373
08-06-2017, 05:37 AM
22. ### calculate intersection sets of cell clones in samples?

Is it possible to calculate the probability of intersection sets in this setting? I have 44000 different cell clones in sample O, I don´t know how...

• Replies: 0
• Views: 381
07-27-2017, 06:58 AM
23. ### Prob of high risk loans defauting, student text question

Hi, first of all thanks for reading this. I'm 47 and trying to teach myself Stats from an excellent textbook as part of my course in maths and...

• Replies: 3
• Views: 383
08-03-2017, 04:29 PM
24. ### get number of participants from given probability

Hi! I have a pool of participants - defined number of tournaments (competitions) - defined participants per tournament (partPerTour) Of...

• Replies: 1
• Views: 460
07-26-2017, 06:09 PM
25. ### Probability of H/T Score AND F/T Score Being Specific Scores...

Hi All, Just trying to answer something in my mind... If I had calculated (using poisson) the chances of various scores occurring in a football...

• Replies: 0
• Views: 514
05-30-2017, 05:01 PM
26. ### Kruskal Walis & Wilcoxon test

Hi all, it would be so kind if someone could explain to me as to why both equations, Kruskal Walis and Wilcoxon, consists of the number 12? The...

• Replies: 1
• Views: 568
08-11-2017, 02:01 PM
27. ### urgent question on the mode, median, variance and mean

We roll two (unbiased) dice and let X and Y be the two numbers that appear. Find the mode, the median, the expectation, and the standard deviation...

• Replies: 1
• Views: 571
08-07-2017, 02:53 AM
28. ### Card Probability Problems

Scenario: If you have a standard deck of 52 cards and you draw 2 of those cards without replacement, what is the probability of: 1) P(getting a...

• Replies: 1
• Views: 698
06-15-2017, 04:59 PM
29. ### decile

hi experts. I 'd like to ask about cluster analysis. to identify the group of customer that which group will have high potential to cancel the...

• Replies: 0
• Views: 702
05-27-2017, 11:34 PM
30. ### Is the order of an event occurs in a sequences of events random?

I am interested in knowing how to analyse whether the order in which an event occurs within a sequence of events is random; i.e. is the likelihood of...

• Replies: 0
• Views: 710
05-25-2016, 06:20 AM
31. ### Essay Grouping Problem

if i have 8 essay topics (a,b,c,d,w,x,y,z) and they will be randomly grouped into 2 groups of 4, what is the probability of getting group (a,b,c,d)?...

• Replies: 1
• Views: 728
06-08-2017, 10:29 PM
32. ### A Puzzling Probability Problem

Hello everyone. I have encountered these problems. I tried to answer them, but I'm not sure if they are correct.:: I would be very grateful if...

• Replies: 4
• Views: 765
07-09-2017, 04:15 AM
33. ### Help in understand this formula

Hello to all, I'm working on a problem which is as follow: There is a buffer which has maximum K capacity to store items. When a request for an...

• Replies: 1
• Views: 776
08-03-2012, 10:20 AM
34. ### Hypothetical example of using probability to control emotions in business

Imagine a company where there are two principals. The first person is the founder and owner of the company. The second person is nearly a partner...

• Replies: 0
• Views: 786
04-16-2017, 05:23 PM
35. ### Interpretation of likelihood ratio and hypothesis testing

Even after extensive search, am unclear on some (basic) concepts regarding likelihood vs. frequentist approach in hypothesis testing. Can you...

• Replies: 0
• Views: 790
06-02-2016, 03:08 AM
36. ### two-sample Kolmogorov-Smirnov test

Hello, Hello, I have recorded some discrete data with an unspecified distribution. I have generated some discrete data from a model. I'm...

• Replies: 0
• Views: 795
02-08-2013, 08:54 AM
37. ### Not Statistically Significant.... or is it?

I am comparing 2 groups to see if there are differences in GPA across 4 years of high school. Group A has a higher mean for all 4 years, BUT... the...

• Replies: 18
• Views: 795
09-02-2017, 10:52 AM
38. ### Help With Potential Textbook Error

I'm reading through the statistics chapter in my research methods textbook and think I may have found a mistake. I was hoping someone here could...

• Replies: 5
• Views: 796
BGM
02-20-2013, 11:15 AM
39. ### Probability of Sampling Error Assistance

Hello! I am working on a mini project and am stuck on the third question! I think it's how the question is phrased that is throwing me off..? I...

• Replies: 0
• Views: 807
05-30-2017, 11:36 PM
40. ### Need help to solve Probability question!

Hi, Need help to solve this probability question! A supplier of company X makes on average 5 defective pieces.The company accepts a sample if...

• Replies: 0
• Views: 809
06-27-2014, 04:14 PM
41. ### My program TARGETS

I used a Monte Carlo method of finding probabilities of collisions between a randomly tossed circular block and non-overlapping randomly placed...

• Replies: 0
• Views: 816
06-03-2015, 02:42 PM
42. ### Probability of default

What is the probability of default in 2 years? The probabilit of default year 1= 10% The probability of default year 2 = 10%

• Replies: 0
• Views: 832
06-04-2015, 02:03 AM
43. ### How to calculate posterior probabilities (Bayes related, I think)

I graduated Uni 16 years ago and generally have no problems with the math and stats I need in my life ... until today. I am breeding horses and there...

• Replies: 2
• Views: 837
05-27-2017, 09:30 PM
44. ### Keno problem: last ball doubles the prize.

Hi, I'm trying to solve this problem, but apparently, Im going in the wrong direction. It's a Keno Game, you choose 15 balls out of 80...

• Replies: 0
• Views: 844
05-20-2013, 10:05 PM
45. ### What is the probability people are forecasting correctly with standard spreadsheets?

It seems that many people are using standard spreadsheets to forecast, getting correlation coefficients, etc. However I decided I needed to write my...

• Replies: 0
• Views: 847
08-03-2015, 08:38 AM
46. ### Basic question about notation

I'm very sorry, perhpas it is a very basic question but I have I doubt about notation: What does it mean this statement?: E(X)=\int xdF, where F...

• Replies: 2
• Views: 849
11-11-2012, 10:10 PM
47. ### lottery tickets, better to buy all for one game or play X number of games

Im wondering which would be better. Im assuming the following, chance of winning = 10,000 for a particular ticket. So if i bought 10 tickets, the...

• Replies: 0
• Views: 851
08-18-2012, 12:47 PM
48. ### Two events meeting

Hello everyone, I have a question regarding two events that take place randomly over a certain time period and meet. A similar problem would be...

• Replies: 4
• Views: 860
09-23-2015, 12:36 PM
49. ### What is chance performance cut-off for a 2-part dichotomous response?

If subjects had to give 2-alternative forced choice responses for a task (Y/N) and then rate the certainty of their response (also 2-alternative...

• Replies: 1
• Views: 860
06-30-2016, 02:02 PM
50. ### Markov limit expectation

I need to find a limit involving a discrete finite state markov chain with absorbing state. It is given that: q(x,c) = r(x) + \beta E_{c'\lvert...

• Replies: 0
• Views: 861
05-06-2016, 10:43 AM
51. ### Joint Distributions and a 3rd Variable

I am struggling with this probability problem. Consider the random variables X and Y with joint distribution as given below. X 0 1 ...

• Replies: 1
• Views: 863
BGM
04-12-2015, 10:53 AM
52. ### Probability of solder ball inside a sealed package able to cause a failure

I have a hermetically sealed semiconductor package, NAND. And I have some foreign object debris (FOD), solder balls to be exact, inside this device....

• Replies: 0
• Views: 863
06-04-2015, 09:21 AM
53. ### Probability of having "Best Qualified" applicants in a subset of the entire pool

Probability of having "Best Qualified" applicants in a subset of the entire pool. I am working on an issue, trying to show whether or not an HR...

• Replies: 0
• Views: 865
04-25-2016, 12:47 AM

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